No oil from North Dakota spill seen in water sources

North Dakota water quality director Dennis Fewless says state and Tesoro officials are closely monitoring the estimated 20,000-barrel spill that covers an area the size of seven football fields near Tioga.

Fewless says a thick layer of clay beneath the spill site is acting as a natural barrier to any water sources below. He says monitoring wells have been placed on the perimeter of the spill area to check for any oil that may escape.